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Permanent magnet synchronous motor NVH optimization method based on frequency adaptive repetitive control

A permanent magnet synchronous motor, frequency self-adaptive technology, applied in the direction of controlling generators, controlling electromechanical brakes, controlling electromechanical transmissions, etc., can solve the problems of reduced suppression effect, vibration and noise of permanent magnet synchronous motors, performance attenuation, etc., and achieve improvement Effects of harmonic suppression capability, improved accuracy, and increased robustness

Pending Publication Date: 2022-07-22
HANGZHOU DIANZI UNIV
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Problems solved by technology

However, when the ratio of the sampling frequency to the disturbance signal frequency is not an integer, the performance of the traditional repetitive controller is attenuated, and the suppression effect is greatly reduced.
Therefore, if the above problems are not solved, the vibration and noise problems of the built-in permanent magnet synchronous motor will still exist

Method used

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  • Permanent magnet synchronous motor NVH optimization method based on frequency adaptive repetitive control
  • Permanent magnet synchronous motor NVH optimization method based on frequency adaptive repetitive control
  • Permanent magnet synchronous motor NVH optimization method based on frequency adaptive repetitive control

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Embodiment Construction

[0046] It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.

[0047] The invention provides an NVH optimization method for permanent magnet synchronous motor based on frequency adaptive repetitive control, such as figure 1 shown, including the following steps:

[0048] S1. Establish a model of the air-gap magnetic field generated by the reaction of the permanent magnet and the armature

[0049] S2. Derive the relationship between the radial electromagnetic force order and the three-phase current harmonic order according to the air-gap magnetic field model. Specifically, the method for deriving the relationship between the radial electromagnetic force order and the three-phase current harmonic order is: by The mathematical relationship between the radial electromagnetic force and the three-phase current and the dq-axis current is obtained by Maxwell's tensor equa...

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Abstract

The invention discloses a permanent magnet synchronous motor NVH optimization method based on frequency adaptive repetitive control. The method comprises the following steps: S1, establishing an air gap magnetic field model generated by a permanent magnet and armature reaction; s2, deducing a relation between a radial electromagnetic force order and a three-phase current harmonic order according to an air-gap magnetic field model; s3, harmonic waves of the dq-axis current are suppressed through a frequency adaptive repetitive control algorithm; and S4, building a joint simulation platform, and verifying the effect. Harmonic waves in a current loop are suppressed by using the frequency adaptive repetitive controller and the PI controller, the ground harmonic content of the three-phase current of the motor is greatly reduced, and the NVH (Noise Vibration and Harshness) performance of the motor is improved.

Description

technical field [0001] The invention relates to the technical field of permanent magnet synchronous motors, in particular to a permanent magnet synchronous motor NVH optimization method based on frequency adaptive repetitive control. Background technique [0002] The built-in permanent magnet synchronous motor is widely used in electric vehicles. Due to the influence of current harmonics, its radial force composition is complex, which makes the NVH problem of the motor more and more prominent. The radial electromagnetic force acts on the motor stator casing, resulting in the deformation of the stator structure, resulting in vibration noise. Many studies have shown that the radial electromagnetic force with lower order and larger amplitude has a more obvious impact on the NVH performance of the motor. [0003] Maximum torque-to-current ratio control (MTPA) is a high-performance control method for controlling built-in permanent magnet synchronous motors, commonly used in elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00H02P21/05H02P6/34H02P25/024
CPCH02P21/0003H02P21/05H02P6/34H02P25/024H02P2207/05
Inventor 刘栋良詹警斌李宇航詹成根陈黎君
Owner HANGZHOU DIANZI UNIV
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